ATI RN
ATI Fluid and Electrolytes
1. You are working on a burns unit, and one of your acutely ill patients is exhibiting signs and symptoms of third spacing. Based on this change in status, you should expect the patient to exhibit signs and symptoms of what imbalance?
- A. Metabolic alkalosis
 - B. Hypermagnesemia
 - C. Hypercalcemia
 - D. Hypovolemia
 
Correct answer: D
Rationale: When a patient exhibits signs and symptoms of third-spacing, where fluid moves out of the intravascular space but not into the intracellular space, hypovolemia is expected. This leads to a decreased circulating blood volume. Increased calcium and magnesium levels are not typically associated with third-spacing fluid shift. Burns usually result in acidosis rather than alkalosis, making metabolic alkalosis an incorrect choice. Therefore, hypovolemia is the correct answer in this scenario.
2. A nurse is caring for a client who is having a subclavian central venous catheter inserted. The client begins to report chest pain and difficulty breathing. After administering oxygen, which action should the nurse take next?
- A. Administer a sublingual nitroglycerin tablet
 - B. Prepare to assist with chest tube insertion.
 - C. . Place a sterile dressing over the IV site
 - D. Re-position the client into the Trendelenburg position.
 
Correct answer: B
Rationale:
3. You are doing discharge teaching with a patient who has hypophosphatemia during his time in hospital. The patient has a diet ordered that is high in phosphate. What foods would you teach this patient to include in his diet? Select all that do not apply
- A. Milk
 - B. Beef
 - C. Poultry
 - D. Liver
 
Correct answer: B
Rationale:
4. What is the function of aldosterone?
- A. Regulates body temperature.
 - B. Decreases blood pressure.
 - C. Increases sodium reabsorption.
 - D. Promotes water excretion.
 
Correct answer: C
Rationale: Aldosterone increases the reabsorption of sodium in the kidneys, which leads to an increase in blood volume and blood pressure. Choice A is incorrect as aldosterone does not regulate body temperature. Choice B is incorrect as aldosterone increases blood pressure by increasing sodium reabsorption. Choice D is incorrect as aldosterone promotes water retention by increasing sodium reabsorption.
5. Electrolytes:
- A. do not form when glucose is added to water.
 - B. dissociate in water solutions, but do not form ions.
 - C. form ions in water solutions, but do not necessarily dissociate.
 - D. dissociate in water solutions and form ions in water solutions.
 
Correct answer: D
Rationale: The correct answer is D. Electrolytes are substances that dissociate into ions when dissolved in water, allowing the solution to conduct electricity. Choice A is incorrect because glucose does not form electrolytes when added to water. Choice B is incorrect as it states that electrolytes dissociate but do not form ions, which is inaccurate as electrolytes do form ions in water solutions. Choice C is also incorrect as it states that electrolytes form ions but may not necessarily dissociate, which goes against the definition of electrolytes that must dissociate into ions for conductivity. Therefore, choice D is the most accurate as it correctly describes that electrolytes dissociate in water solutions and form ions, highlighting the essential characteristics of electrolytes.
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